Improvement

Improvements are a type of card in Artifact. They share the same card layout and stats as Spells, but focus on permanently altering lanes rather than one-off effects.

After being played, Improvements modify the target lane with their effect permanently, which is indicated by positioning an icon between the lane's tower and its owner. Improvements will remain until condemned, although some have a limited number of charges before they are effectively depleted.

Over time, Improvements can completely overwhelm a lane in a manner that's harder to clear than doing the same with Creeps or Heroes. Stay on top of keeping the board clear, or face the consequences.

List of Improvements

Card		Color	Rarity	Set	Mana Cost	Charges	Crosslane	Text
	Assault Ladders	Black	Uncommon	Call to Arms	3	0	1	Allies deal +2 damage when attacking a tower.
	Assured Destruction	Black	Rare	Call to Arms	3	0	1	All heroes have +4 Siege.
	Bitter Enemies	Black	Rare	Call to Arms	2	3	1	After the combat phase, remove a charge from Bitter Enemies. Before the action phase, if there are zero charges on Bitter Enemies, deal 6 damage to both towers.
	Escape Route	Black	Rare	Call to Arms	1	0	1	[Cooldown: 1] Return an allied hero to the Fountain.
	Iron Fog Goldmine	Black	Common	Call to Arms	3	0	1	Get 3 gold after the combat phase.
	Keenfolk Turret	Black	Uncommon	Call to Arms	4	0	1	[Cooldown: 1] Deal 2 piercing damage to a unit.
	March of the Machines	Black	Rare	Call to Arms	5	3	1	Before the action phase, if there are charges on March of the Machines, remove one and deal 2 damage to the enemy tower and 2 damage to each enemy.
	Path of the Cunning	Black	Rare	Call to Arms	3	0	1	After you play a black card, modify a random ally with +1 Siege.
	Revtel Investments	Black	Rare	Call to Arms	3	0	1	Add a charge to Revtel Investments after the combat phase.<br/><br/>[Cooldown: 1] Get 4 gold for each charge. Condemn Revtel Investments.
	Steam Cannon	Black	Rare	Call to Arms	7	0	1	[Cooldown: 1] Deal 4 piercing damage to a unit in any lane.
	The Oath	Black	Rare	Call to Arms	3	0	1	You can not play spells or creeps while this is the active lane. If there is an allied black hero in this lane, allies have +4 Attack.
	The Tyler Estate	Black	Uncommon	Call to Arms	4	0	1	Both towers have -2 Mana.
	Trebuchets	Black	Common	Call to Arms	1	0	1	Deal 2 piercing damage to the enemy tower before the action phase.
	Unsupervised Artillery	Black	Uncommon	Call to Arms	2	0	1	[Cooldown: 1] Deal 4 piercing damage to the enemy tower. May only be used if there are no unblocked enemies.
	Aghanim's Sanctum	Blue	Uncommon	Call to Arms	4	0	1	[Cooldown: 1] Fully restore your tower's Mana.
	Barracks	Blue	Uncommon	Call to Arms	5	0	1	Summon a Melee Creep into this lane each deployment phase.
	Conflagration	Blue	Rare	Call to Arms	5	0	1	Deal 2 damage to each enemy before the action phase.
	Fractured Timeline	Blue	Rare	Call to Arms	2	0	1	Before the action phase, give a random card in opponent's hand +1 Lock.
	Glyph of Confusion	Blue	Rare	Call to Arms	6	0	1	Whenever any unit enters this lane, stun it this round.
	Howling Mind	Blue	Uncommon	Call to Arms	3	0	1	You and your opponent draw an extra card each round.
	Ignite	Blue	Common	Call to Arms	3	0	1	Deal 1 piercing damage to each enemy before the action phase.
	Messenger Rookery	Blue	Common	Call to Arms	1	0	1	[Cooldown: 1] Choose an ally. Choose a combat target for it.
	Path of the Wise	Blue	Rare	Call to Arms	3	0	1	After you play a blue card, deal 1 piercing damage to a random enemy.
	Watchtower	Blue	Rare	Call to Arms	1	0	1	Whenever an enemy improvement enters this lane, draw a card.
	Altar of the Mad Moon	Green	Uncommon	Call to Arms	4	0	1	Allied Melee Creeps have +2 Regeneration.
	Cheating Death	Green	Rare	Call to Arms	4	0	1	[Cooldown: 1] Give a unit a Death Shield this round. May only be used if there is an allied green hero in this lane.
	Homefield Advantage	Green	Uncommon	Call to Arms	4	0	1	Before the action phase disarm a random enemy this round.
	Mist of Avernus	Green	Uncommon	Call to Arms	3	0	1	Modify allies with +1 Attack before the action phase.
	Path of the Dreamer	Green	Rare	Call to Arms	3	0	1	After you play a green card, give your tower +3 Regeneration until end of round.
	Selemene's Favor	Green	Common	Call to Arms	4	0	1	Your tower has +2 Mana.
	Unearthed Secrets	Green	Rare	Call to Arms	3	0	1	Draw a card after the combat phase if your tower was dealt damage this round.
	Verdant Refuge	Green	Common	Call to Arms	5	0	1	Allies have +1 Armor.
	Burning Oil	Red	Uncommon	Call to Arms	1	0	1	Your tower has +2 Retaliate.
	Grand Melee	Red	Rare	Call to Arms	3	0	1	If there is an allied red hero in this lane, all heroes have +2 Cleave.
	Nether Ward	Red	Rare	Call to Arms	4	0	1	After opponent plays a spell, deal 3 damage to the enemy tower.
	Path of the Bold	Red	Rare	Call to Arms	3	0	1	After you play a red card, modify a random ally with +1 Attack.
	Steel Reinforcement	Red	Common	Call to Arms	4	0	1	Your tower has +1 Armor.
	Temple of War	Red	Uncommon	Call to Arms	3	0	1	All equipped heroes have +2 Attack and +1 Armor.
	The Omexe Arena	Red	Uncommon	Call to Arms	6	0	1	Draw a card after a hero dies.

Cards that Affect Improvements

Card		Color	Rarity	Text
	Apotheosis Blade	{{}}	Rare	Equipped hero has +8 Attack and +4 Siege. Condemn each unit equipped hero deals battle damage to. Active 1: Condemn enemy improvements. Condemn each item equipped b
	Demagicking Maul	{{}}	Uncommon	Equipped hero has +2 Attack. Active 1: Condemn a random enemy improvement. May only be used if equipped hero is unblocked.
	Dirty Deeds	Black	Uncommon	Deal 2 damage to the enemy tower for each of its improvements.
	Obliterating Orb	{{}}	Uncommon	Condemn an improvement.
	Pugna	Red	Rare	Active 3: Condemn a random enemy improvement.
	Raze	Red	Rare	Condemn all enemy improvements.
	Smash Their Defenses!	Red	Uncommon	Condemn an improvement. Draw a card.
	Watchtower	Blue	Rare	Whenever an enemy improvement enters this lane, draw a card.